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Avionics

STC ST09957SC

FAA DRS lists ST09957SC as Current · Issued, held by Aircraft Systems & Mfg, for Boeing 727-100 Series and Boeing 727-200 Series. Recorded change: Installation of Innovative Solutions & Support (IS&S) digital air data system consisting of an electric altimeter, Digital Air Data Computer (DADC), Air Data Display Unit (ADDU), and an altitude alerter. Snapshot dated June 30, 2026.

FAA-listed holder
Aircraft Systems & Mfg
Aircraft configurations
2
FAA revision date
FAA status
Current · Issued

Recorded modification

What the FAA record covers

Installation of Innovative Solutions & Support (IS&S) digital air data system consisting of an electric altimeter, Digital Air Data Computer (DADC), Air Data Display Unit (ADDU), and an altitude alerter.

ST09957SC identifies the approval, recorded holder, named aircraft, and modification scope. It does not confirm kit availability, serial-number effectivity, data rights, price, or installation authority.

Applicability

Aircraft named in FAA DRS

Named aircraft: Boeing 727-100 Series and Boeing 727-200 Series. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Boeing 727-100 SeriesA3WEBoeing 727-200 SeriesA3WE

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Boeing 727-100 Series and Boeing 727-200 Series model, serial range, and configuration?
  2. 02Which part numbers, software versions, interfaces, and manual changes apply?
  3. 03Who can legally supply the design data, kit, instructions, and ICAs?
  4. 04What parts, labor, conformity, and return-to-service work are excluded?

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